A phlegm that’s gray in color is popular among smokers or those who have exposure to elements like coal. You also need to get a checkup for phlegm of this color to rule out infections or other complications.
Yellow or Green
According to the Wexner Medical Center of Ohio State University, these two colors indicate an infection in the body. On its own, it does not reveal much. But combining this symptom with other symptoms like fever, body chills, malaise, and sore throat may indicate a medical condition. Usually, the best way to determine for sure is by getting a checkup with a health practitioner in the soonest possible time.
Things get really serious with brown phlegm. It indicates a more severe problem in the lungs like pneumonia, cystic fibrosis, or bronchiectasis. This is especially true if it goes beyond the regular infection that is cured by oral antibiotics.
In some cases, you will need a greater medical intervention like a constant IV drip of antibiotics. If there are underlying conditions that lead to this issue, you need constant medical attention for a phlegm of this type.